Q6 The cross-section of an earthen dam is shown below; Assuming that the water level remains constant at 35m, determine the seepage loss through the dam. The width of the dam is 300m, and the soil is isotropic with k=5.8x107m/s. 50 m 35 m Filter 50 m 20 m 20 m 30 m

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If 40% of hydrostatic head is lost in flowing through soil B (that has k = 0.06 cm/s) as shown in figure below, then the discharge velocity and the seepage velocity through soil B are respectively [Consider level at point 1 as datum] Soil A B e 0.6 0.8 T 40 cm # 40 cm # 40 cm 1 G 2.67 2.65 (1) Soil A (2) Soil B

A trough is 12m long, 5m wide, and 3m deep. The vertical cross-section of the trough parallel to an end is shaped like an isoceles triangle (with height 3m, and base, on top, of length 5m). The trough is full of water (density 1000kg/m³ and g = 9.8m/s² is the acceleration due to gravity). a) Find the amount of work in joules required to empty the trough by pumping the water over the top. b) Find the amount of work in joules required to empty the trough by pumping the water out of a spout 4m high.